Performance of the eGFR equations for the participants with Cin2 in the validation set.

Abbreviations and definitions: MDRD, Modification of Diet in Renal Disease; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; P30, the percentage within 30% of inulin clearance; bias, median difference of inulin clearance and estimated GFR (Cin – eGFR); precision, interquartile range of the bias; RMSE, root mean square error; Kappa, kappa coefficients of the eGFR equations for the classification of CKD stages.#P*p**P